Jacquard mechanism for looms



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JAGQUARD MECHANISM FOR LOOMS.-

Patented May 9, 1882.

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; JAOQUARD MECHANISM FOR LOOMS. No. 257,690. Patented May 9, 1882.

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I J. 0. PRYER. I JAUQUARD MECHANISM FOR, LOOMS.

tented May 9, 1882.

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7 UNITED STATES PATENT OFFICE.

JOHN O. FRYER, OF LOWELL, MASSACHUSETTS.

VJACQUARID MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 257,690, dated May 9,1882. Application filed July 8, 1880. (No model.)

quard Mechanisms for Looms, of which the following is a specification.

My invention relates to what is called the jacquard of a loom, meaningthat mechanism which (independently of the harnesses which dispose thewarps for the ground of the fabric) in weaving figured goods causesthose threads which produce the figure to rise and fall at the'propertimes, and my saidinvention is intended exclusively for looms which forma figure on one face only of the fabric.

The object of my invention is to revolve the pattern-prism but once intwo picks, and thus to make a given figure (on one face of the fab ric)with only half the pattern-cards required by the jacquards commonlyused, thus also avoiding to a great extent the danger of mispicks andthe trouble of punching half the cards and the weight of half the cards.This I accomplish by causing the prism to be rotated by the falling ofthe grid and by causmore properly, at every other pickt-hat is, by

the combination, with the grid provided with,

a piece slotted outward and upward, and mechanism for causing said griflto fall at every other pick of the loom, of the-prism and mechanism forcausing said prism to revolve at the falling of said grifi; or, morespecifically, in the combination of the grifi" provided with a pieceslotted upward and outward, the griif-lever and -its connecting-rods,the counter-shaft provided with a crank and a gear, the main shaft, alsoprovided with a gear, the former gear having twice as many teeth as thelatter gear and caused to revolve by thelatter, the

prism provided with pins, and the pawl or hook pivoted to the frame ofthe jacquard.

- The accompanying drawings, on three sheets, represent my invention.Figures 1 and 4 are front elevations of my jacquard, the grid being upin Fig. 1 and down in Fig. 4. Figs. 2 and 5 are end elevations of thesame, the grift' being up in Fig. 2 and down in Fig. 5, the latterfigure also showing the main shaft and the counter-shaft. Fig. 3 is anend elevation of the prism,with the swin gin g frame, apart of thelatter being broken away to show the T- bar hearing on the end of theprism,) the pawl and spring, and part of the jacquard-frame.

Fig. 6 is a horizontal section of the jacquard just above the grid, thegrid being up. Figs. 7 and 8 are side elevations of a single hook andits needle, with the prism and the griffin section. In both figures thegritf is up, but the positionof the hook and grift' when both are downis shown by dotted lines in Fig. 7, and in this figure the needle is ina position to allow the hook to fall with the griff. In Fig. 8 theneedle prevents the hook from falling with the griff when the griffdrops to the position shown by the dotted lines.

A is the'frame of thejaequard, and maybe supported on the loom-frame orsecured to the ceiling of the room in which theloom is placed.

B is the vertically-reciprocating griff.

O is the gritf-lever, being in effect a forked lever, but usually madeof an arm secured to a shaft turning in the frame A, projecting on eachside of said frame, and stiftly secured to two parallel pieces or arms,one 011 each side of the frame, as shown in Figs. 1 and 6, said shaftand three arms forming the lever O.

The lever G is connected by rods D to the grid, and by another rod, E,to the crank or eccentric, which, through said lever andconnecting-rods, raises and lowers the grid".

F is the pattern-prism, secured to the lower part of the swinging frameGr.

H is a pawl pivoted-to thefraineand hooked on the upper side, which,catching on pins l, driven into the end of. the prism at its corners,rotates the prism.

Various other devices, (well known,) all of which depend for theiroperation upon the swinging of the frame G, may be substituted for thepawl and pins.

All of the parts above designated by letters of reference are of theusual construction, and

need no further description.

the main shaft or crank-shaft, as it is commonly called, operates thelay and revolves necessarily once for every pick; but the counter-shaftrevolves only half as fast as the main shaft, and therefore, by means ofthe connectin g-rod E and griff-lever and rods D, raises the griff atone pick and causes said griff to fall at the next pick.

Raising the griff swings the prism F in toward the needles T, becauseapiece, O, rigidly secured to or made in one piece with the griff isslotted at P upward and outward from the grid, as shown in Figs. 2 and5, and the end of the prism-shaft reaches into the slot P, the prism, asalready stated, having its journals in the swinging frame G. Loweringthe grid of course swings the prism in the other direction, the pins Icatching in the pawl 11 and causing the prism to make a quarter of arevolution as it swings out, the pins I slipping over the beveled freeend of the pawl as the prism swings in. The prism is usually preventedfrom making more than quarter of a revolution by a piece or bar,Y,called the T, in shape like an inverted T, said bar being pressed downupon the end of the prism by a spring, Y. The lifting of the gritf alsoraises the vertical hooks Q by the shoulders R on the shanks of saidhooks, these hooks being of sheet metal and running through slots inhorizontal bars A A, secured to said frame A, so

that the hooks have no motion except in the direction of their length,whereas ordinarily the hooks swing from their lower ends, and beinghooked'at the top, as well as at the bottom, they are caught by thegrift' only when their hooks are swung over the grift'.

The shanks of the hooks Q are passed through vertical slots V in thehorizontal needles T, (see Figs. 7 and 8,) and are provided with othershoulders, R, placed at such a height on theshank that when the hooksare lifted by the griff said last-named shoulders R rise just above thetops of the needles T.

The needles T are pushed out toward the prism by spiral springs U, andthe points of the needles enter perforations in the cards W, or arecrowded back by being struck by the unperforated parts of the card verymuch in the usual manner; but the needles, instead of beingofround wireofuniform diameter, looped to receive the shanks of round hooks, areslotted to receive the flat hooks above described, and,instead of beingbent to form bearings for the springs, are larger than the springs indi- I ameter and turned down to enter the springs and to form shouldersfor the springs to bear against, and are also turned down small to enterthe pattern-cards W. The needles T are supported in parts A A of theframe A, the ends of said needles passing through said parts A A, asshown, so that said needles are limited to a longitudinal motion.

It is evident that when the hooks are first lifted by the grid, whichevery time it rises lifts all the hooks not already up, the needles willbe pushed by their springs toward the prism until the needles (or, atleast, such of them as are not stopped by the pattern-card) are pushedunder the shoulders R, and that the hooks whose shoulders overhang theneedles will be supported by said needles until their respective needlesare forced back by being struck by the unperforated spaces of thepattern-cards W in the usual manner, so that the hooks do not all fallat every fall of the grifi", but remain up until the pattern requiresthem to fall.

When an ordinary Jacquard loom is formin g a figure on one face only ofthe fabric every alternate card must be punched full-that is, with ahole for each needle-for the hooks must all rise at every other pick orthere will be a line of color on the reverse of the fabric. I dispensewith every other card-that is,with the full cards-by having my prismrevolve only when the grift' fallsr-that is, once in two picks.

I claim as my invention 1. The combination, with the grid B, piece 0,slotted upward and outward, and mechanism for causing said grift' tofall at every other pick of the loom, of the'prism F and mechanism forcausing said prism to revolve atthe falling of said griff, as and forthe purpose specified.

2. The combination of the griff B, piece 0, slotted at P upward andoutward, the grifile' verC, and its connecting-rods D E, thecountershaft L, provided with a crank, X, and a gear, 100 M, the mainshaft K, also provided with a gear, N,the former gear, M, having twiceas many teeth as the latter gear, N, and caused to revolve by thelatter, the prism F, provided with pins I, and the pawl or hook H, asand for the 105 purpose specified.

JOHN O. FRYER.

Witnesses ALBERT M. Moonn, IRVING S. PORTER.

